Wrench.



R. W. STURDY.

WRENCH.

APPLICATION FILED MAY 13, 1912.

Patented 001;. 14, 1913.

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ROBERT w. STURDY, on Srifimnson, MICHIGAN; ASSIGNOR on ONE-HALF :ro Cassius W. MOEWAN, OI OMAHA, NEBRASKA. e

\ WRENCH.

1,075,516. Specification of Anfilieation-filedd'flay 1a, 1912. SarialNo. 696,333.

To all whom it may concern:

- Ben known that 1, Roman W. Srunnn, a' citizen of the United States, residing at Stephenson, in "the county' of Menominee and State of Michigan, have invented cer* tain new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to improvements in wrenches, and has for its object to: provide a wrench of the quick-action: class, consist.- ing of few' and simple parts, so thatit may be conveniently and: economically manuf-actuned, and: will be durable andconvenient in:

use.

- Another object is to provide a wrench so constructed that its: parts may be readilyconnected or disconnected, thisv being desirable so that. any one part may be convene iently' replaced:- if injured or broken.

The invention consists of the novel con.- struction, combinationand arrangement of parts as described. herein and claimed, and as illustrated in the drawing, it being understood that changes-in. form, size, proportion and minor details may be made within the scope of the claim without departing from the spirit or sacrificing any of the advantages of the invention.

'In the. drawing Figure 1 is a side view, partly broken, ofa wrench embodying my invention. Fig. 2 is a side View of the wrench, the jaws being extended or separated, the handle being broken away. Fig. 3 is a view in longitudinal section of the recessed jaw-member. Fig. 4 is a transverse sectional view of the same, on line fl 4 of Fig. 6. Fig. 5 is a side view of a second jaw-member employed. Fig. 6 is a side view of the wrench to illustrate facility for adjusting the handle and rack-bar as may be desired for gripping larger or smaller objects. Fig. 7 is a plan view of the second jaw-member. Fig. 8 is a View of a threaded pin or pivot. Fig. 9 shows an end portion of the handle, being a front or rear view Referring to the drawing for a more particular description, numerals 1 and 2 indicate the two jaws of the wrench, these for convenience being elsewhere designated as first and second jaw-members. J aw-member l-is substantially L-shaped and consists of the holding-lug 3 and body-portion 4, the

latter being formed with a recess 5 to pro- While the outer-wallof the jaw-member thus described is of curved or convexed form,.this

feature is not important any further than that when constructed in this form a required strength is provided: without employing surplus material, and said form provides ahead for-the wrench which will not be obtrusive. holding lug 3 and' body portion. shall befiat, iso that when the wrench is disposed flatwise, said holding-lug may make contact 5 with any object to be gripped or held. Jawlmember 2 preferably is of segment-shape {and has a length and. thickness correspondling respectivelywith the length and: thickinessof holding-lug 3. It is provided'on one [of its endswith a rack 9, and is formed beitween its endt and rack with. a pair of opjposiitely-disposed, parallel grooves 10. The gtwo jaw-members as thus described may be.

;constructed as: separate, integral parts; imemher 2 may he slida-blly mounted upon lmember 1, the rack being disposed in recess- 1, ridges 7- engagingwithin grooves 1 0. If the second jaw-member is moved in the direction. of lug 3, the rack-bar will move inwardly of the recess.

At 11 are indicated parallel bearings consisting of the front walls of the inwardlyprojecting ridges 7 At 12 are indicated parallel bearings consisting of the end wall of the second jawmember which also forms the outer wall of each groove 10, and during the movement of the jaws, each of walls 11 will be in contact with a wall 12 since the ridges engage with? in the grooves, and therefore any lateral movement of the rack-bar will be prevented.

At 13 is indicated an operating-lever, bar or handle for the wrench. Near its inner end it is provided with trunnions 14, and with a segment gear 15, the longitudinal axis of the trunnions being the center of the gear. The handle is pivotally mounted upon the first jaw-member, the segment gear being disposed within recess 5 and the trunnions engaging in apertures 8 cf the sideplates. Since apertures 8 are elongated and extend longitudinally and outwardly from the inner part of the side plates, the trun- It is desirable that the sides of the nions will be normallydisposed in the innermost part of the apertures and the segment gear'will normall be disposed in engagement with the raclz.

Having fully described the several parts and their uses, any extended explanation relating to operation, is not necessary. swinging movement of the handle in one direction or forwardly will causethe jaws to be spaced apart, the rack-bar moving without resistance outwardly of the head of the wrench, the limit of the swinging movement of the handle in this direction being reached when said handle makes engagement with the sto or terminal a of the curved wall 16 of aw-member 1. A movement of the handle in an opposite direction will cause jaw-member 2 to move in the direction of lu 3 to grasp or compress any object dispose therebetween, and, as is obvious, an increase of force thus applied to the handle will result in an increased compression.

By the construction shown, the handle is fulcrumed .in the side plates and the lever-' age may be increased or decreased by respectively decreasing or increasing the distance between the rack-bar and aperture 8 forthe pivotal mounting of the handle.

The advantages to be derived by the employment of elongated apertures 8 are that the segment gear may be disengaged fromthe rack bar, temporarily, so that it ma be partly rotated without moving the rackar, and the angle of the handle may be changed with reference to the rack-bar, as shown by a comparison of Figs. 2 and 6 of the drawing, and this adjustable feature adds materially to the usefulness of the wrench. Also on account of this construction, jaw-member 2 may be conveniently removed from the wrench whenever desired.

The trunnions for the segment gear may be rovided b emgiloying the pin 1) shown in ig. 8. in may have a threaded A mounting in an aperture (not shown) which may extend through the middle of the segment gear, this being for convenience, when assem ling the parts. After the inner end of the handle has been inserted in recess 5, pin 1) may be mounted in the gear, and the wrench will then be ready for use.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is- A wrench comprising a pair of jaws having sliding engagement with each other, one of said jaws comprising a pair of spaced side walls between which the other of said jaws travels, said last named jaw having a rack formed upon its rear face, an operatin handle, a segmental pinion carried by said handle, trunnions pro ecting beyond the side faces of said pinions, and arcuate slots formed in the said spaced side walls in which said trunnions engage, movement of the handle to open the jaws causing the pinion acting with one of the teeth of the rack as a fulcrum to move out of engagement with said rack to which end said arcuate slots are arranged eccentric to said fulcrum. In testimony whereof I have aflixed my signature in presence of two witnesses.

ROBERT w. STURDY.

' Witnesses:

- 'J. H. MARSON, Bnssm Houue. 

